Returns the square of the distance between two coordinates.
Syntax
DIST2(Coordinate a, Coordinate b)
Input
| Coordinate a | is an (X,Y) coordinate |
| Domain type: | a coordinate system |
| Coordinate b | is an (X,Y) coordinate |
| Domain type: | a coordinate system |
Output
| DIST2 returns: | a value |
| Domain: | system domain Value |
Notes:
Tip:
When the definition symbol = is used, a dependent output column is created; when the assignment symbol := is used, the dependency link is immediately broken after the output column has been calculated.
Usable in
Simple calculators, TabCalc, MapCalc
Examples
Pocket line calculator examples:
? DIST2(COORD(10,15),COORD(20,20)) |
|
returns the square distance between coordinate (10,15) and coordinate (20,20), i.e. 125 |
|
? DIST2(COORD(10,15,LatLon),COORD(20,20,LatLonWGS84)) | |
returns the square distance between coordinate (10,15) and coordinate (20,20) ignoring the coordinate systems, i.e. 125 |
|
TabCalc example:
Point map Rainfall shows the location of rainfall stations in the area of Cochabamba, Bolivia. To calculate the squared distance between rainfall station PROMIC and all other rainfall stations, type on the command line of the table window:
Distance = DIST2(Coordinate,PNTCRD(Rainfall,"PROMIC"))
Rainfall.mpp opened as table |
Working table |
||||
ID |
Name |
Coordinate |
Distance |
||
1 |
UMSS |
(803429.00, 8074631.00) |
34911760.000 |
||
2 |
Taquina |
(799748.00, 8082415.00) |
11940849.000 |
||
3 |
Laguna Santa Rosa |
(803511.00, 8087422.00) |
48956125.000 |
||
4 |
Laguna Totura |
(801281.00, 8088967.00) |
73752480.000 |
||
5 |
PROMIC |
(802613.00, 8080483.00) |
0.000 |
||
6 |
Aro Caqua |
(806816.00, 8076585.00) |
32859613.000 |
||
7 |
Colca Pithua |
(797465.00, 8078352.00) |
31043065.000 |
||
8 |
Cerro MachaMach |
(796346.00, 8087736.00) |
91881298.000 |
||
9 |
Laguna WaraWara |
(806042.00, 8085414.00) |
36072802.000 |
||
See also:
| COORD | MINCRDX | MAPCRD | RASVALUE |
| CRDX | MINCRDY | MAPROW | DIST |
| CRDY | MAXCRDX | MAPCOL | |
| TRANSFORM | MAXCRDY | MAPVALUE |